html,body{
    width: 100%;
    height: 100%;
}
body{
    background-image: url('../imgs/bg1.jpg');
    background-size: 100% 100%;
}
.form-signin{
    width: 300px;
    margin: 100px auto 0;
    h2{
        color: #ccc;
    }
    input{
        margin-bottom: 15px;
    }
}